The rear sight on your gun needs to be removed to install your red dot on this plate. This plate only works with the Vortex Venom. Installation Instructions Remove the rear sight* Install the EGW Sight Mount in the dovetail Place the red dot sight on the EGW Sight Mount (placing a small piece of paper between the red dot sight and the sight mount will make for easier removal and will keep Loctite off of the red dot sight.) Apply blue Loctite to the provided mounting screws Torque mounting screws to 15in/lbs Modification of your firearm may nullify the manufacturer's warranty. This product should be installed and checked by a qualified Mfg: Egw